碳纳米管
材料科学
复合材料
复合数
热导率
环氧树脂
小型化
共价键
聚合物
导电体
热的
纳米技术
化学
有机化学
物理
气象学
作者
Xu Li,Bin Wu,Peng Chen,Ru Xia,Jiasheng Qian
标识
DOI:10.1016/j.coco.2023.101591
摘要
The miniaturization of integrated circuits promotes the rapid rise of polymer-based carbon nanotubes (CNTs) thermal conductive composites. However, the unordered arrangement structure and interfacial thermal resistance of CNTs become important obstacles affecting their application. The directional orientation driven of CNTs by external force and the "bridge" between CNTs constructed via covalent bonding could solve these issues. Herein, the freeze-casting orientation configuration and new CNTs grew in situ by ZIF-67 constructed the hierarchical structure of CNTs in epoxy resin (EP)-based composites. The composites with directional networks of interlinked CNTs achieve an out-plane thermal conductivity value (κ⊥) of 0.98 W m−1 K−1 at filler loading of 5.8 vol%, which is 4.85 times high than that of pure EP. More importantly, non-equilibrium molecular dynamics (NEMD) simulations validated the advantage of using covalent bonding to connect CNTs. This work provides a way for the reasonable design of polymer-based CNTs thermal conductive composites.
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